TEventLog class

Declaration

Inheritance

1. TEventLog
2. TComponent
3. TPersistent
4. TObject

Description

TEventLog is a component which can be used to send messages to the system log. In case no system log exists (such as on Windows 95/98 or DOS), the messages are written to a file. Messages can be logged using the general Log call, or the specialized Warning, Error, Info or Debug calls, which have the event type predefined.

See also

• Log
• Warning
• Error
• Info
• Debug

Properties

AppendContent	published	Control whether output is appended to an existing file.
Identification	published	Identification string for messages.
EventFilter	published
LogType	published	Log type.
Active	published	Activate the log mechanism.
RaiseExceptionOnError	published	Determines whether logging errors are reported or ignored.
DefaultEventType	published	Default event type for the Log call.
FileName	published	File name for log file.
TimeStampFormat	published	Format for the timestamp string.
CustomLogType	published	Custom log type ID.
EventIDOffset	published	Offset for event ID messages identifiers.
Paused	published	Is the message sending paused ?

Methods

CheckInactive	protected
EnsureActive	protected
MapTypeToEvent	protected
MapTypeToCategory	protected
MapTypeToEventID	protected
Create	public	Creates a new instance of the component.
Destroy	public	Clean up TEventLog instance.
EventTypeToString	public	Create a string representation of an event type.
RegisterMessageFile	public	Register message file.
UnRegisterMessageFile	public	Unregister the message file (needed on windows only).
Pause	public	Pause the sending of log messages.
Resume	public	Resume sending of log messages if sending was paused.
Log	public	Log a message to the system log.
Warning	public	Log a warning message.
Error	public	Log an error message to.
Debug	public	Log a debug message.
Info	public	Log an informational message.

Events

OnGetCustomCategory	published	Event to retrieve custom message category.
OnGetCustomEventID	published	Event to retrieve custom event ID.
OnGetCustomEvent	published	Event to retrieve custom event Code.
OnLogMessage	published	Implement custom handling of log messages.

Inherited

From TComponent (74)

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From TPersistent (5)

Assign AssignTo FPOAttachObserver FPODetachObserver FPONotifyObservers

From TObject (37)

AfterConstruction CheckDisposed ClassInfo ClassName ClassNameIs ClassParent ClassType CleanupInstance DefaultHandler DefaultHandlerStr Dispatch DispatchStr Disposed DisposeOf Equals FieldAddress Free FreeInstance GetDisposed GetHashCode GetInterface GetInterfaceByStr GetInterfaceEntry GetInterfaceEntryByStr GetInterfaceTable GetInterfaceWeak GetLastCastErrorInfo InheritsFrom InitInstance InstanceSize MethodAddress MethodName newinstance QualifiedClassName StringMessageTable SystemHasExtendedRTTI UnitName